Matrix properties
number of rows	3,072
number of columns	3,072
nonzeros	119,808
structural full rank?	yes
structural rank	3,072
# of blocks from dmperm	2
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	92%
numeric value symmetry	46%
type	complex
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	B. Medeke
editor	R. Boisvert, R. Pozo, K. Remington, B. Miller, R. Lipman, R. Barrett, J. Dongarra
date	1999
kind	theoretical/quantum chemistry problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,015,776
Cholesky flop count	7.8e+08
nnz(L+U), no partial pivoting, with AMD	2,028,480
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,047,318
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,789,278

SVD-based statistics:
norm(A)	6.91391
min(svd(A))	0.00552874
cond(A)	1250.54
rank(A)	3,072
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.